CVE-2017-9139: There is a stack-based buffer overflow on some Tenda routers (FH1202/F1202/F1200: versions before 1.2.0.20).

Security readout for executives and security teams

CVE-2017-9139 affects some Tenda FH1202, F1202, and F1200 routers running firmware before 1.2.0.20. The reported impact is a short denial of service against the router web login service, lasting about 1 to 2 seconds. Sources do not show active exploitation or data compromise. Exposure is most relevant where affected Tenda router administration interfaces are reachable from untrusted networks. Organizations using FH1202, F1202, or F1200 routers should verify firmware versions before 1.2.0.20 and assess whether the web UI is externally reachable. Treat this as a targeted network hygiene issue, not an emergency breach signal. Prioritize internet-exposed or business-critical routers first, then update or replace remaining affected devices through normal infrastructure maintenance. Mitigation focus: Identify any Tenda FH1202, F1202, or F1200 routers in use.; Check Tenda guidance and update affected firmware to 1.2.0.20 or later if available.; Restrict router web administration access to trusted management networks..

Prepared

Jun 13, 2026, 05:01 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.